package com.kl.drs.util;

import java.security.MessageDigest;

/**
 * md5加密字符串工具类
 * @author WYN
 *
 */
public class Md5StringUtil {
	public static String string2MD5(String inStr){
		MessageDigest md5 = null;
		try{
		md5 = MessageDigest.getInstance("MD5");
		}catch (Exception e){
		System.out.println(e.toString());
		e.printStackTrace();
		return "";
		}
		char[] charArray = inStr.toCharArray();
		byte[] byteArray = new byte[charArray.length];

		for (int i = 0; i < charArray.length; i++)
		byteArray[i] = (byte) charArray[i];
		byte[] md5Bytes = md5.digest(byteArray);
		StringBuffer hexValue = new StringBuffer();
		for (int i = 0; i < md5Bytes.length; i++){
		int val = ((int) md5Bytes[i]) & 0xff;
		if (val < 16)
		hexValue.append("0");
		hexValue.append(Integer.toHexString(val));
		}
		return hexValue.toString();

		}

		/**
		* 加密解密算法 执行一次加密，两次解密
		*/ 
		public static String convertMD5(String inStr){

		char[] a = inStr.toCharArray();
		for (int i = 0; i < a.length; i++){
		a[i] = (char) (a[i] ^ 't');
		}
		String s = new String(a);
		return s;
		}
}
